private Task <int> ValidateState(CancellationToken cancellationToken)
{
switch (_state)
{
case FrameStreamState.Open:
if (cancellationToken.IsCancellationRequested)
{
return(TaskUtilities.GetCancelledZeroTask(cancellationToken));
}
break;
case FrameStreamState.Closed:
throw new ObjectDisposedException(nameof(FrameRequestStream));
case FrameStreamState.Aborted:
return(TaskUtilities.GetCancelledZeroTask());
}
return(null);
}
